If you've been happy with Samsung I'd recommend you stay with them. Galaxy devices run android, but a very customized UI. The Galaxy S4 is a great every-man's phone. The features they pack into that phone are insane, and you can get them fairly reasonably priced now. If you have extra money to spend though, take a look at the Galaxy Note III. It looks huge and unwieldy, but you get used to it quick and it's a real powerhouse. Of course your best bet is to go to a store and play with a few different phones and get a good feel for what you like.